期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 73, 期 -, 页码 128-138出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2020.07.040
关键词
p-n junction; Ti3C2Tx MXene; Nanocomposites; Acetone gas sensor; Room temperature sensing
资金
- National Natural Science Foundation of China [51572158, 51972200]
- Graduate Innovation Fund of Shaanxi University of Science Technology
- Japan Society for the Promotion of Science (JSPS) [20H00297, 16H06439]
- Nippon Sheet Glass Foundation for Materials Science and Engineering
- Dynamic Alliance for Open Innovations Bridging Human, Environment and Materials, the Cooperative Research Program of Network Joint Research Center for Materials and Devices
The nanocomposite SnO-SnO2/Ti3C2Tx sensor, synthesized by a one-step hydrothermal method, showed improved acetone gas sensing response at room temperature.
Acetone, as widely used reagents in industry and laboratories, are extremely harmful to the human. So the detection of acetone gas concentrations and leaks in special environments at room temperature is essential. Herein, the nanocomposite combining SnO-SnO2 (p-n junction) and Ti3C2Tx MXene was successfully synthesized by a one-step hydrothermal method. Because of the existence of a small amount of oxygen during the hydrothermal conditions, part of the p-type SnO was oxidized to n-type SnO2, forming in-situ p-n junctions on the surface of SnO. The hamburger-like SnO-SnO2/Ti3C2Tx sensor exhibited improved acetone gas sensing response of 12.1 (R-g/R-a) at room temperature, which were nearly 11 and 4 times higher than those of pristine Ti3C2Tx and pristine SnO-SnO2, respectively. Moreover, it expressed a short recovery time (9 s) and outstanding reproducibility. Because of the different work functions, the Schottky barrier was formed between the SnO and the Ti3C2Tx nanosheets, acting as a hole accumulation layer (HALs) between Ti3C2Tx and tin oxides. Herein, the sensing mechanism based on the formation of hetero-junctions and high conductivity of the metallic phase of Ti3C2Tx MXene in SnO-SnO2/Ti3C2Tx sensors was discussed in detail. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据